Frame for duplicating apparatus



(No Model.)

B. s. WALKER. FRAME FOR DUPLIGATING APPARATUS.

Patented Mar; 6, 1894..

All/gm aw/ messes UNITED STATES PAT NT OFFICE.

ELIAS S. WALKER, OF DULUTI-I, MINNESOTA.

FRAME FOR DUPLICATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 516,139, dated March6,1894.

Application filed April 2 7, 1 893.

To aZZ whom it may concern.-

Be it known that I, ELIAS S. WALKER, a citizen of the United States,residing at Duluth, 1n the county of St. Louis and State of Minnesota,have invented certain new and useful Improvements in Frames forDuplicating Apparatus; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to certain new and useful improvements in aduplicating'apparatus frame and means for operating the stencil platesof such machines, and it consists of a novel foot treadle operatingmechanism for ralsing the stencil frame or plate, the said frameautomatically returning to its normally lowered condition, as will behereinafter described and claimed.

In the accompanying drawings, Figure l is a perspective view of a tablewith a mimeograph and other duplicating apparatus upon the same and myfoot treadle stencil frame operating mechanism applied to the same. Fig.2 is a longitudinal section through a portion of the top of the tableand the duplicatlng apparatus and stencil frame operating mechanism, andFig. 3 is a front elevation of the pulley post, a cleat applied to theunder side of the duplicating apparatus and pulley, the duplicatingframe being shown in section.

A in the drawings represents the base of a duplicating apparatus and Bthe stencil frame or plate which is hinged at its rear end to the saidbase.

0 represents a pulley post which is provided with a slot near itsupperend in which is journaled a sheave or pulley D, while the lower endof the post is bent at right angles tothe upright portion thereof toform a foot E. A hook or catch F is also pivoted near the upper end ofthe post in close proximity to the pulley.

G represents a U-shaped bail which is provided centrally of its lengthwith an eye or hook g and is attached by its ends to the side of thestencil frame, as shown.

H is a cable of wire or rope which is attached to the hook or eye 9 ofthe bail and passed over the pulley D and down the back of the pulleypost through a small hole in the table and connected by its lower end toa foot treadle I. The foot treadle is located under the table withinconvenient reach of the foot of an operator seated at said table.

J is a cleat which is screwed or otherwise secured to the under side ofthe duplicating frame A, and is provided wit-h a passage j for thereception of the foot E of the pulley post. By this construction, thepulley post can be readily placed in position upon the duplicating frameand held in such position without the use of any other fastening means.By providing the stencil frame with the U -shaped bail and attaching thecable to said bail instead of directly to the frame, the upward movementof said frame will be limited, and the bail will be of such length as toprevent the frame being lifted to a perpendicular or past aperpendicular position, so that it will always automatically return, byits gravity, to its normally closed position.

The operation of the device is as follows: The stencil frame is raisedby pressing firmly and steadily with the foot on the treadle; a piece ofpaper to be printedis placed in position upon the base plate; thepressure on the treadle is slackened and the stencil frame automaticallydrops to a closed position; an inked roller is then passed over thestencil in the usual manner and by again pressing on the treadle thestencil frame is lifted, the printed sheet removed and the operationrepeated, as described until the desired amount of work is accomplished.By this construction and arrangement, the work can be much more rapidlydone, with less labor and the work appear much neater and cleaner. Byhaving a U-shaped hail the operation of the roller is not interferedwith, as it can be read ily and conveniently passed under the same. Whenit is desired to hold the stencil plate or frame in a raised conditionfor any purpose, it is simply necessary to lower the hook F over thebail.

The invention is very simple and cheap and very efficient in itsoperation, the stencil frame being manipulated entirely independently ofthe hand.

What I claim as my invention is 1. The combination with a duplicatingapparatus employing a base plate and a hinged stencil frame, of avertical post carrying a pulley, and provided with a hook a foot treadlefor raising the stencil frame and a cable passed over the pulleyin thepost and connected to the stencil frame and to the foot treadle, thestencil frame after being raised by the treadle being adapted toautomatically return to a lowered, closed condition, substantially asdescribed.

2. In aduplicating apparatus, the combination of a base plate, a stencilframe hinged thereto, a vertical post carrying a pulley, a bailconnected to the stencil frame, a foot treadle for raising the stencilframe, and a cable passed over the pulley of the post and connected tothe bail and treadle, the stencil frame after being raised by thetreadle being adapted to be automatically returned to a lowered, closedcondition, substantially as described.

3. In a duplicating apparatus, the combination of a base plate, astencil frame hinged thereto a vertical post carryinga pulley near itsupper end, a U shaped bail connected to stencil frame which permits ofthe uninter-- ELIAS S. WALKER.

Witnesses:

DINNIE WOOL, W. O. BERGERSON.

